JimR

I think your primary choice in concertina system (ie EC Anglo Duet) would be a good option.

The Musical Instrument Museum in N Phoenix has one on display in the Mechanical Music Room. Along with music boxes, player pianos and the like.

If you search for Honri using the forum Search box you will find much information about Mr Honri.

Concertining?

That must have been interesting. Mr Pearson, in the second video, looks like Bill Paxton.

Have you visited The Button Box in Sunderland, MA, along the Connecticut river? Their concertina room has quite a selection.

It was amusing, but - mostly - only when you meant it to be!

Is a CD required? An mp3 album would still need releases, etc, but the costs of CD creation could be avoided.

I too have had tinnitus for a long time, but so far is not debilitating. Visit https://www.tinnitustalk.com/ There are many, varied discussions there that may help you.

Are you certain the button is not inside?

I 'd expect any monospaced font would work.

While scanning the wiki Jody mentioned, I saw a link to the American Folklore Society. On the AFS Home page I noticed a piece of folk sport - duckpin bowling. A little off topic, I suppose, but interesting to me, anyway.

I just downloaded the collection and #1 played as expected, on a Windows Surface tablet.

I searched for concertina on eBay in the Musical Instruments and Gear category. the listing above was on the last page (page 8).

I have used, sparingly, I'm afraid, a program called Functional Ear Trainer. There are other Solfege progs around too. My HS Chemistry teacher used to say Hear it, Write it, Say it, Remember it.